Water shortage has become a tough issue for all humans in today's world. The developed countries keep reusing the reclaimed water and the sewage resources in virtue of the technical advantages, which can relieve the urgent demand of water resources in economic and social development. It has become an effective way for solving the water resources shortage. MBR (MembraneBioreactor) water treatment technique is the highly effective biochemical water treatment technique combined with biotechnology and film technology. As one kind of effective sewage treatment technique combined with film separation technology and traditional sludge method, MBR can make all the organisms intercepted in the bioreactor through menbrane filtration, separating the hydraulic retention time and sludge age thoroughly and remaining relatively high MLSS in the bioreactor. Strong nitrification and high removal rate of pollutants; MBR is applicable to the treatment and reuse of daily domestic sewage of the living quarters, hotels and restaurants, resorts, schools and office buildings and other decentralized users, and the treatment of organic sewage in the brewing, tanning, food and chemical engineering industry. The water treated by MBR is generally used for non-drinking purpose such as irrigation, washing, environmental hygiene and landscaping.As one kind of sewage treatment system featured by simple operation, high automation level and modular design, MBR has the following advantages: Half of the floor space can be saved compared with the traditional treatment systems; The system can maintain high MLSS value (<15g/l) and long sludge retention time (<60days); Stable quality of water treated; Less residual sludge and treatment costs; and Low energy consumption, simple cleaning and low operation costs.